extern crate rustijvm;

fn steps(machine: &mut rustijvm::Machine, num: usize) {
    for _ in 0..num {
        machine.step().unwrap();
    }
}

#[test]
fn advancedstack_100() {
    let mut machine = rustijvm::Machine::new_from_file("files/advanced/teststack.ijvm").unwrap();

    steps(&mut machine, 1);
    steps(&mut machine, 2 * 100);
    assert_eq!(machine.get_tos(), Ok(0x2));
}

#[test]
fn advancedstack_3000() {
    let mut machine = rustijvm::Machine::new_from_file("files/advanced/teststack.ijvm").unwrap();

    steps(&mut machine, 1);
    steps(&mut machine, 2 * 3000);
    assert_eq!(machine.get_tos(), Ok(0x2));
}

#[test]
fn advancedstack_50000() {
    let mut machine = rustijvm::Machine::new_from_file("files/advanced/teststack.ijvm").unwrap();

    steps(&mut machine, 1);
    steps(&mut machine, 2 * 50000);
    assert_eq!(machine.get_tos(), Ok(0x2));
}

#[test]
fn advancedstack_contents() {
    let mut machine = rustijvm::Machine::new_from_file("files/advanced/teststack.ijvm").unwrap();

    steps(&mut machine, 1);
    steps(&mut machine, 2 * 100);

    let stack = machine.cur_stack();
    let size = stack.len();
    assert!(size >= 100);

    let markers = (0..size).filter(|i| { stack.get(*i) == 0x2 }).count();
    assert!(markers >= 99);
}

#[test]
fn advancedstack_method() {
    let mut machine = rustijvm::Machine::new_from_file("files/advanced/teststack2.ijvm").unwrap();

    steps(&mut machine, 8);
    {
        let stack = machine.cur_stack();
        let markers = (0..stack.len()).filter(|i| { stack.get(*i) == 0x2 }).count();
        assert_eq!(markers, 4);
    }

    steps(&mut machine, 1);
    steps(&mut machine, 2 * 5000);
    {
        let stack = machine.cur_stack();
        let markers = (0..stack.len()).filter(|i| { stack.get(*i) == 0x2 }).count();
        assert!(markers > 4000);
    }
}